小编Dan*_*nte的帖子

我正试图通过锁定屏幕显示Google位置服务(打开GPS,网络数据等)对话框.

我正在使用KeyguardManager来禁用锁定屏幕.这可以正常工作,因为我的MainActivity能够禁用锁定屏幕.但是,只要Google位置服务对话框显示,锁定屏幕就会恢复启用,屏幕会被锁定,除非我解锁屏幕,否则无法进入我的MainActivity.

我甚至试过...... Flag_Show_When_Locked,但它没有帮助.

这是我的代码:

private KeyguardLock DisableScreenLock; 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);

    setContentView(R.main_layout);


    KeyguardManager myKeyGuard = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);
    DisableScreenLock = myKeyGuard.newKeyguardLock("disableKeyguard");
    DisableScreenLock.disableKeyguard();
}


protected synchronized void GoogleApiClient_Intialize() {
    Log.e(TAG, "Building GoogleApiClient");
    googleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
}
protected void LocationRequest_Intialize() {
    locationRequest = new LocationRequest();
    locationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
    locationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}

protected void LocationSettingsRequest_Builder() {
    LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
    builder.addLocationRequest(locationRequest);
    locationSettingsRequest = builder.build();
}
@Override
public void onConnected(Bundle connectionHint) {
    Log.e(TAG, "GoogleApiClient is connected"); …

旋转位图我遇到了很多麻烦.下面的代码有效,但它比Galaxy Note 2手机附带的Gallery应用程序慢4-6倍.

码:

    File DirectoryFile = new File(Image_Path); 
    Bitmap bitmap = BitmapFactory.decodeFile(DirectoryFile.getAbsolutePath()); 



    String imagePATH = FileLocation + "test.jpg";
    final File newfile = new File(imagePATH);           

    FileOutputStream mFileOutputStream = null;
    try {                   
           mFileOutputStream = new FileOutputStream(newfile);
       } catch (FileNotFoundException e1) { }

        try {
        Bitmap RotatedBitmap =  RotateImage(imagePATH, bitmap);
        RotatedBitmap.compress(Bitmap.CompressFormat.JPEG, 100, mFileOutputStream);
        bitmap.recycle(); 
        RotatedBitmap.recycle();

        mFileOutputStream.flush();
        mFileOutputStream.close();

    } catch (IOException e) {
        e.printStackTrace();
    }

private Bitmap RotateImage(String filePath, Bitmap bitmap) throws IOException {
    ExifInterface exif = new ExifInterface(filePath);
    int exifOrientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, …

我一直在努力研究如何在 Lollipop 上重命名 DocumentFile。很抱歉，我曾试图到处搜索解决方案，但似乎缺少有关此新 SD 卡访问 API 的在线信息。

这是我所拥有的：

        String EditText = (Alert_EditText.getText().toString()).trim();
        Uri uri = ListViewObject_List.get(LastItemPos).getImageUri();
        final DocumentFile documentFile = DocumentFile.fromSingleUri(MainClass.this, uri);
        documentFile.renameTo(EditText);

它提出了一个 UnsupportedOperationException：

FATAL EXCEPTION: main
Process: com.camera.test, PID: 3362
java.lang.UnsupportedOperationException
at android.support.v4.provider.SingleDocumentFile.renameTo(SingleDocumentFile.java:105)
at com.camera.test.MainClass$21.onClick(MainClass.java:986)
at android.view.View.performClick(View.java:5242)
at android.widget.TextView.performClick(TextView.java:10530)
at android.view.View$PerformClick.run(View.java:21185)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6872)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)

我也试过这个：

    String EditText = (Alert_EditText.getText().toString()).trim();
    Uri uri = ListViewObject_List.get(LastItemPos).getImageUri();
    File file = new File(uri.getPath());
    final DocumentFile documentFile = DocumentFile.fromFile(file); …